I'd bring him in for Stewart when he gets fit enough, which may be 2-3 weeks away. Despite the size difference, I reckon he offers more in the air than Stewart. He's probably better around the ground too.
I'm not sold on Stewart yet. He has played a few good halves when we are on song, but has gone missing when the heat is on. At the moment I'd persevere with Stewart because he is working up and down the ground and providing an option, but I don't have him in my best 18.
Long term I see Laverde as a forward rather than a mid. I don't think he's particularly good below his knees, which is an essential trait for misfielders. As a lead-up option and link man he is very good. I think high half-forward is his natural role. He's also one of our better kicks for goal.